Vibrating converter



Sept. 12, 1944. A. LEIFER ETAL 2,357,334

VIBRATING CONVERTER Filed Dec. 28, 1939 INVENTORS BY 77% M ATTORNEY.

Patented Sept. 12, 1944 UNITED STATES PATENT OFFlC 2,357,834 VIBRATING CONVERTER Alfred Leifer and Friedrich Schilgen, Berlin, Germany; vested in the Alien Property Custodian Application December 28 2 Claims.

In a vibrating converter or vibrating rectifier the vibrating flat spring carrying the moving contacts generally consists of steel. The spring thus possesses a certain magnetic permeability, a certain electric conductivity and the necessary mechanical elasticity.

In accordance with the present invention the properties of the vibrating spring as regards permeability, electric conductivity and elasticity are substantially enhanced in that the flat spring is composed of at least two layers on which the one consists of a material which has a high permeability while the other layer consists of a materia1- having a high electric conductivity and favorable mechanical elastic properties, more especially spring bronze.

An example of construction embodying the idea of the invention is shown in the figure. The oscillating spring F or the vibrating converter consists of two thin layers a and b which are welded together or soldered together or simply riveted and of which the one (a) consists of soft iron while the other one (b) consists of spring steel or which is even better of spring bronze. The layer formed of soft iron provides a high resultant permeability of the flat spring thus establishing a favorable magnetic closing of the field of the exciter coil E by the strap B and the fiat spring F. The part consisting of spring bronze assures a high conduction so that the current heat transmitted to the spring will be low. At the same time there can be attained a sumcient elasticity without subsequent effects. This is assured more especially if the layer (a) composed of soft iron is substantially thinner than the layer (b) made of spring bronze.

We claim:

1. In a circuit interrupter, electromagnetic means including a core providing a base construction and having thereon an energizing winding at one magnetic pole, which has a pole face forming one side of a magnetic gap, an elongated vibrating magnetic armature mounted at one end on said base construction and having its other end free to vibrate and positioned adjacent said pole face to provide the other side or said magnetic gap, said armature being 1939, Serial No. 311,314 Germany November 10, 1938 formed of two contiguous strips of metal tightly held together throughout their lengths, said strips being of diiierent thickness with the thinner of the strips being of high permeability soi't iron and the thicker of the strips being of a highly conductive resilient metal whereby the armature readily transmits electricity and at the same time possesses high magnetic permeability, movable contact means mounted on said armature, and cooperating insulated contact means mounted on said base construction and positioned to be alternately engaged by said movable contact means as a result of the vibration of said armature, whereby said electromagnet means causes said armature to vibrate with resultant making and breaking of the electrical circuits.

2. In a circuit interrupter, electromagnetic means including a core providing a base construction with a magnetic pole which has a pole face forming one side of a magnetic gap, an energizing winding on said core, an elongated vibrating magnetic armature mounted at one end on said base construction and having its other end free to vibrate and positioned adjacent said pole face to provide the other side of said magnetic gap, said armature bein formed of two contiguous strips of metal tightly held together throughout their lengths, said strips being of difierent thickness with the thinner of the strips being of high permeability soft iron and the thicker of the strips being of a highly conductive resilient metal whereby the armature readily transmits electricity and at the same time possesses high magnetic permeabilit'", movable contact means mounted on said armature, and cooperating insulated contact means mounted on said base construction and positioned to be alternately engaged by said movable contact means as a result of the vibration of said armature, whereby said electromagnet means causes said armature to vibrate with resultant making and breaking of the electrical circuits. 

